"The girls are so very excited for their musical to be released," a source told RadarOnline.com. "They absolutely love what Jennifer Saunders has done with the script. It's going to be unlike anything anyone has ever seen on stage. Fans of the Spice Girls and younger generations that never knew their music will get to experience what Girl Power is all about!"

Brown was the last one to sign the approval of the use of her name and image for the musical this week. "Mel B is pushing for it to happen. It would be an opportunity of a lifetime for the band to perform in front of a worldwide audience in front of the best athletes in their country - well, there are no words!" the source continued. "Mel B and Emma Bunton are agreeable to doing it, but the holdout seems to be Victoria Beckham. She has so much going on ... and she isn't agreeing to it - yet!"

Whispers that Spice Girls would perform at the 2012 Olympic Games have been spreading since 2009. Their manager Simon Fuller said back then, "They stand for so much in British music history and I can't think of a better time for them to get back together for another performance." Halliwell was also pro the situation, saying in another occasion, "Singing at the Games is a great idea and would be an amazing opportunity - and it's a sign the Brits are back. This is our time. Everything is circular and now there's a British pop revival."